refactored core tv_show object variable next_aired into property function

WebSessions now called on demand
Refactored WebSessions class
Added provider test for urls
Added cloudflare web hook for requests
Fixed yggtorrent provider
Refactored tests

refactored failed download handling to no longer be a optional feature as its a requirement for failed snatch handling to work correctly, delete on failed is defaulted to false

This reverts commit 2722ee56

updated config to v12

Fixed unicode title issues for Newpct provider
Fixed unicode title issues for EliteTorrent provider
Set EliteTorrent provider to public
Added alert box to top of page notifying when developer mode is enabled